The HCPL-7860/HCPL-786J Optically Isolated Modulator and HCPL-0872 Digital Interface IC or digital filter together form an isolated programmable two-chip analog-to-digital converter. The isolated modulator allows direct measurement of motor phase currents in power inverters.
In operation, the HCPL-7860/ HCPL-786J Isolated Modulator (optocoupler with 3750 V RMS
dielectric withstand voltage rating) converts a low-bandwidth analog input into a high-speed one-bit data stream using a Sigma-Delta ( Σ− ∆ ) over-sampling modulator. This modulation provides for high noise margins and excellent immunity against isolation-mode transients. The modulator data and on-chip sampling clock are encoded and transmitted across the isolation boundary where they are recovered and decoded into separate high-speed clock and data channels.
Features:-
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12-bit Linearity.
- 200 ns Conversion Time (Pre-Trigger Mode 2 with HCPL-0872).
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12-bit Effective Resolution with 5μs Signal Delay (14-bit with 102μs) (with HCPL-0872).
- Fast 3 μs Over-Range Detection (with HCPL-0872 ).
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± 200 mV Input Range with Single 5 V Supply.
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1% Internal Reference Voltage Matching.
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Offset Calibration (with HCPL-0872).
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-40°C to +85°C Operating Temperature Range.
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15 kV/ μs Isolation Transient Immunity.
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Safety Approval: UL 1577, CSA and IEC/EN/DIN EN 60747-5-2.
Applications :-
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Motor Phase and Rail Current Sensing.
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Data Acquisition Systems.
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Industrial Process Control.
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Inverter Current Sensing.
- General Purpose Current Sensing and Monitoring.
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